Display screen or portion thereof with icon



FIG. 1 is a front view of a display screen or portion thereof with icon, showing our new design; and,

FIG. 2 is a front view of a second embodiment thereof.

The broken line showing of the display screen is included for the purpose of illustrating environmental structure and forms no part of the claimed design. 

CLAIM The ornamental design for a display screen or portion thereof with icon, as shown and described. 